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libcupsfilters/0001-Fix-issues-reported-by-OpenScanHub-79.patch
Zdenek Dohnal bc24685700 RHEL-71935 Fix several important issues reported by OSH 
Resolves: RHEL-71935
2025-02-12 15:06:50 +01:00

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From d21dd1c9b643f0d77f2c37807d3e2317493d6eb1 Mon Sep 17 00:00:00 2001
From: zdohnal <zdohnal@redhat.com>
Date: Tue, 11 Feb 2025 09:38:19 +0100
Subject: [PATCH] Fix issues reported by OpenScanHub (#79)
Open source static analyzer OpenScanHub found several issues regarding
resource leaks, security, buffer overflows etc., which this PR aims to
address.
libcupsfilters passes sanity testing with the changes.
---
cupsfilters/bannertopdf.c | 25 ++++++++++++++-------
cupsfilters/fontembed/sfnt-subset.c | 8 ++++++-
cupsfilters/ghostscript.c | 2 +-
cupsfilters/image-jpeg.c | 22 +++++++++++++++++--
cupsfilters/image-png.c | 2 +-
cupsfilters/image-tiff.c | 34 +++++++++++++++++++++++++----
cupsfilters/imagetopdf.c | 5 +++++
cupsfilters/imagetoraster.c | 2 +-
cupsfilters/pdftopdf/pdftopdf.cxx | 20 ++++++++++++++---
cupsfilters/pwgtopdf.cxx | 24 +++++++++++++++-----
cupsfilters/raster.c | 2 +-
cupsfilters/testfilters.c | 1 +
cupsfilters/texttopdf.c | 14 +++++++++++-
13 files changed, 132 insertions(+), 29 deletions(-)
diff --git a/cupsfilters/bannertopdf.c b/cupsfilters/bannertopdf.c
index eb9020d6..4da87ef9 100644
--- a/cupsfilters/bannertopdf.c
+++ b/cupsfilters/bannertopdf.c
@@ -63,9 +63,12 @@ banner_free(banner_t *banner)
{
if (banner)
{
- free(banner->template_file);
- free(banner->header);
- free(banner->footer);
+ if (banner->template_file)
+ free(banner->template_file);
+ if (banner->header)
+ free(banner->header);
+ if (banner->footer)
+ free(banner->footer);
free(banner);
}
}
@@ -224,7 +227,12 @@ banner_new_from_file(const char *filename,
break;
}
- banner = calloc(1, sizeof *banner);
+ if ((banner = calloc(1, sizeof *banner)) == NULL)
+ {
+ if (log)
+ log(ld, CF_LOGLEVEL_ERROR, "cfFilterBannerToPDF: Not enough memory");
+ goto out;
+ }
while (getline(&line, &len, f) != -1)
{
@@ -248,12 +256,12 @@ banner_new_from_file(const char *filename,
while (*key == '%')
key ++;
- if (!strcasecmp(key, "template"))
+ if (!banner->template_file && !strcasecmp(key, "template"))
banner->template_file = template_path(value, datadir);
- else if (!strcasecmp(key, "header"))
- banner->header = strdup(value);
- else if (!strcasecmp(key, "footer"))
+ else if (!banner->header && !strcasecmp(key, "header"))
banner->header = strdup(value);
+ else if (!banner->footer && !strcasecmp(key, "footer"))
+ banner->footer = strdup(value);
else if (!strcasecmp(key, "font"))
*num_options = cupsAddOption("banner-font",
strdup(value), *num_options, options);
@@ -1003,6 +1011,7 @@ cfFilterBannerToPDF(int inputfd, // I - File descriptor input stream
banner_free(banner);
if (options) cupsFreeOptions(num_options, options);
unlink(tempfile);
+ fclose(inputfp);
return (ret);
}
diff --git a/cupsfilters/fontembed/sfnt-subset.c b/cupsfilters/fontembed/sfnt-subset.c
index f1803ed9..97ac3509 100644
--- a/cupsfilters/fontembed/sfnt-subset.c
+++ b/cupsfilters/fontembed/sfnt-subset.c
@@ -229,7 +229,13 @@ _cfFontEmbedOTFSubSet(_cf_fontembed_otf_file_t *otf,
if (glyphs[b] & c)
{
const int len = _cfFontEmbedOTFGetGlyph(otf, iA);
- DEBUG_assert(len >= 0);
+ if (len < 0)
+ {
+ fprintf(stderr, "Cannot get the glyph.\n");
+ free(new_loca);
+ free(new_glyf);
+ return (-1);
+ }
memcpy(new_glyf + offset, otf->gly, len);
offset += len;
}
diff --git a/cupsfilters/ghostscript.c b/cupsfilters/ghostscript.c
index 87ff5c00..fbcc6c40 100644
--- a/cupsfilters/ghostscript.c
+++ b/cupsfilters/ghostscript.c
@@ -780,7 +780,7 @@ cfFilterGhostscript(int inputfd, // I - File descriptor input
{
cf_filter_out_format_t outformat;
char buf[BUFSIZ];
- char *filename;
+ char *filename = NULL;
char *icc_profile = NULL;
char *tmp;
char tmpstr[1024],
diff --git a/cupsfilters/image-jpeg.c b/cupsfilters/image-jpeg.c
index 561d51d6..bcd6e360 100644
--- a/cupsfilters/image-jpeg.c
+++ b/cupsfilters/image-jpeg.c
@@ -175,8 +175,26 @@ _cfImageReadJPEG(
cfImageSetMaxTiles(img, 0);
- in = malloc(img->xsize * cinfo.output_components);
- out = malloc(img->xsize * cfImageGetDepth(img));
+ if ((in = (cf_ib_t*)calloc(img->xsize * cinfo.output_components, sizeof(cf_ib_t))) == NULL)
+ {
+ DEBUG_printf("DEBUG: Not enough memory.");
+
+ jpeg_destroy_decompress(&cinfo);
+
+ fclose(fp);
+ return (1);
+ }
+
+ if ((out = (cf_ib_t*)calloc(img->xsize * cfImageGetDepth(img), sizeof(cf_ib_t))) == NULL)
+ {
+ DEBUG_printf("DEBUG: Not enough memory.");
+
+ jpeg_destroy_decompress(&cinfo);
+
+ free(in);
+ fclose(fp);
+ return (1);
+ }
jpeg_start_decompress(&cinfo);
diff --git a/cupsfilters/image-png.c b/cupsfilters/image-png.c
index 9690cdf5..a6fd9a6d 100644
--- a/cupsfilters/image-png.c
+++ b/cupsfilters/image-png.c
@@ -211,7 +211,7 @@ _cfImageReadPNG(
}
bpp = cfImageGetDepth(img);
- out = malloc(img->xsize * bpp);
+ out = (cf_ib_t*)calloc(img->xsize * bpp, sizeof(cf_ib_t));
if (!in || !out)
{
diff --git a/cupsfilters/image-tiff.c b/cupsfilters/image-tiff.c
index d92cce25..20dfbaee 100644
--- a/cupsfilters/image-tiff.c
+++ b/cupsfilters/image-tiff.c
@@ -316,8 +316,21 @@ _cfImageReadTIFF(
else
pstep = xdir;
- in = malloc(img->xsize * 3 + 3);
- out = malloc(img->xsize * bpp);
+ if ((in = (cf_ib_t*)calloc(img->xsize * 3 + 3, sizeof(cf_ib_t))) == NULL)
+ {
+ DEBUG_puts("DEBUG: No enough memory.\n");
+ TIFFClose(tif);
+ fclose(fp);
+ return (1);
+ }
+ if ((out = (cf_ib_t*)calloc(img->xsize * bpp, sizeof(cf_ib_t))) == NULL)
+ {
+ DEBUG_puts("DEBUG: No enough memory.\n");
+ free(in);
+ TIFFClose(tif);
+ fclose(fp);
+ return (1);
+ }
}
else
{
@@ -326,8 +339,21 @@ _cfImageReadTIFF(
else
pstep = ydir;
- in = malloc(img->ysize * 3 + 3);
- out = malloc(img->ysize * bpp);
+ if ((in = (cf_ib_t*)calloc(img->ysize * 3 + 3, sizeof(cf_ib_t))) == NULL)
+ {
+ DEBUG_puts("DEBUG: No enough memory.\n");
+ TIFFClose(tif);
+ fclose(fp);
+ return (1);
+ }
+ if ((out = (cf_ib_t*)calloc(img->ysize * bpp, sizeof(cf_ib_t))) == NULL)
+ {
+ DEBUG_puts("DEBUG: No enough memory.\n");
+ free(in);
+ TIFFClose(tif);
+ fclose(fp);
+ return (1);
+ }
}
//
diff --git a/cupsfilters/imagetopdf.c b/cupsfilters/imagetopdf.c
index 3ad72c43..f95c9859 100644
--- a/cupsfilters/imagetopdf.c
+++ b/cupsfilters/imagetopdf.c
@@ -656,6 +656,7 @@ cfFilterImageToPDF(int inputfd, // I - File descriptor input stream
doc.pageObjects = NULL;
doc.gammaval = 1.0;
doc.brightness = 1.0;
+ doc.row = NULL;
//
// Open the input data stream specified by the inputfd ...
@@ -1871,6 +1872,8 @@ cfFilterImageToPDF(int inputfd, // I - File descriptor input stream
//
cfImageClose(doc.img);
+ free(doc.row);
+ free(doc.pageObjects);
fclose(doc.outputfp);
close(outputfd);
return (0);
@@ -1881,6 +1884,8 @@ cfFilterImageToPDF(int inputfd, // I - File descriptor input stream
"cfFilterImageToPDF: Cannot allocate any more memory.");
free_all_obj(&doc);
cfImageClose(doc.img);
+ free(doc.row);
+ free(doc.pageObjects);
fclose(doc.outputfp);
close(outputfd);
return (2);
diff --git a/cupsfilters/imagetoraster.c b/cupsfilters/imagetoraster.c
index 0cb94506..e2295862 100644
--- a/cupsfilters/imagetoraster.c
+++ b/cupsfilters/imagetoraster.c
@@ -259,7 +259,7 @@ cfFilterImageToRaster(int inputfd, // I - File descriptor input stream
customBottom = 0.0,
customRight = 0.0,
customTop = 0.0;
- char defSize[41];
+ char defSize[64];
cf_filter_out_format_t outformat;
//
diff --git a/cupsfilters/pdftopdf/pdftopdf.cxx b/cupsfilters/pdftopdf/pdftopdf.cxx
index bdf2475d..57e41a31 100644
--- a/cupsfilters/pdftopdf/pdftopdf.cxx
+++ b/cupsfilters/pdftopdf/pdftopdf.cxx
@@ -859,8 +859,8 @@ cfFilterPDFToPDF(int inputfd, // I - File descriptor input stream
{
pdftopdf_doc_t doc; // Document information
char *final_content_type = data->final_content_type;
- FILE *inputfp,
- *outputfp;
+ FILE *inputfp = NULL,
+ *outputfp = NULL;
const char *t;
int streaming = 0;
size_t bytes;
@@ -953,7 +953,10 @@ cfFilterPDFToPDF(int inputfd, // I - File descriptor input stream
// Process the PDF input data
if (!_cfProcessPDFToPDF(*proc, param, &doc))
+ {
+ fclose(inputfp);
return (2);
+ }
// Pass information to subsequent filters via PDF comments
std::vector<std::string> output;
@@ -978,7 +981,10 @@ cfFilterPDFToPDF(int inputfd, // I - File descriptor input stream
outputfp = fdopen(outputfd, "w");
if (outputfp == NULL)
+ {
+ fclose(inputfp);
return (1);
+ }
if (!streaming)
{
@@ -994,9 +1000,9 @@ cfFilterPDFToPDF(int inputfd, // I - File descriptor input stream
while ((bytes = fread(buf, 1, sizeof(buf), inputfp)) > 0)
if (fwrite(buf, 1, bytes, outputfp) != bytes)
break;
- fclose(inputfp);
}
+ fclose(inputfp);
fclose(outputfp);
}
catch (std::exception &e)
@@ -1004,12 +1010,20 @@ cfFilterPDFToPDF(int inputfd, // I - File descriptor input stream
// TODO? exception type
if (log) log(ld, CF_LOGLEVEL_ERROR,
"cfFilterPDFToPDF: Exception: %s", e.what());
+ if (inputfp)
+ fclose(inputfp);
+ if (outputfp)
+ fclose(outputfp);
return (5);
}
catch (...)
{
if (log) log(ld, CF_LOGLEVEL_ERROR,
"cfFilterPDFToPDF: Unknown exception caught. Exiting.");
+ if (inputfp)
+ fclose(inputfp);
+ if (outputfp)
+ fclose(outputfp);
return (6);
}
diff --git a/cupsfilters/pwgtopdf.cxx b/cupsfilters/pwgtopdf.cxx
index 06a21565..160a4e75 100644
--- a/cupsfilters/pwgtopdf.cxx
+++ b/cupsfilters/pwgtopdf.cxx
@@ -1536,6 +1536,7 @@ cfFilterPWGToPDF(int inputfd, // I - File descriptor input stream
int total_attrs;
char buf[1024];
const char *kw;
+ int ret = -1; // Return value
(void)inputseekable;
@@ -1602,6 +1603,7 @@ cfFilterPWGToPDF(int inputfd, // I - File descriptor input stream
{
if (log) log(ld, CF_LOGLEVEL_ERROR,
"cfFilterPWGToPDF: PCLm output: No printer IPP attributes are supplied, PCLm output not possible.");
+ fclose(outputfp);
return (1);
}
@@ -1703,7 +1705,8 @@ cfFilterPWGToPDF(int inputfd, // I - File descriptor input stream
{
if (log) log(ld, CF_LOGLEVEL_ERROR,
"cfFilterPWGToPDF: PCLm output: Printer IPP attributes do not contain printer resolution information for PCLm.");
- return (1);
+ ret = 1;
+ goto error;
}
attr_name = (char *)"pclm-compression-method-preferred";
@@ -1759,7 +1762,8 @@ cfFilterPWGToPDF(int inputfd, // I - File descriptor input stream
{
if (log) log(ld, CF_LOGLEVEL_ERROR,
"cfFilterPWGToPDF: Unable to create PDF file");
- return (1);
+ ret = 1;
+ goto error;
}
}
@@ -1795,7 +1799,8 @@ cfFilterPWGToPDF(int inputfd, // I - File descriptor input stream
{
if (log) log(ld, CF_LOGLEVEL_ERROR,
"cfFilterPWGToPDF: Unable to start new PDF page");
- return (1);
+ ret = 1;
+ goto error;
}
// Write the bit map into the PDF file
@@ -1805,7 +1810,8 @@ cfFilterPWGToPDF(int inputfd, // I - File descriptor input stream
{
if (log) log(ld, CF_LOGLEVEL_ERROR,
"cfFilterPWGToPDF: Failed to convert page bitmap");
- return (1);
+ ret = 1;
+ goto error;
}
}
@@ -1813,8 +1819,8 @@ cfFilterPWGToPDF(int inputfd, // I - File descriptor input stream
{
if (log) log(ld, CF_LOGLEVEL_DEBUG,
"cfFilterPWGToPDF: Input is empty, outputting empty file.");
- cupsRasterClose(ras);
- return (0);
+ ret = 0;
+ goto error;
}
close_pdf_file(&pdf, &doc); // output to outputfp
@@ -1826,4 +1832,10 @@ cfFilterPWGToPDF(int inputfd, // I - File descriptor input stream
fclose(outputfp);
return (Page == 0);
+
+error:
+ cupsRasterClose(ras);
+ fclose(outputfp);
+
+ return (ret);
}
diff --git a/cupsfilters/raster.c b/cupsfilters/raster.c
index 93975d3d..528de7dd 100644
--- a/cupsfilters/raster.c
+++ b/cupsfilters/raster.c
@@ -604,7 +604,7 @@ cfRasterSetColorSpace(cups_page_header_t *h, // I - Raster header
int cspace_fallback = 0; // 0: originally requested color space
// 1: sRGB for color, sGray for mono
// 2: sRGB for mono
- const char *p, *q;
+ const char *p, *q = NULL;
// Range-check
if (!h || !available || !cspace)
diff --git a/cupsfilters/texttopdf.c b/cupsfilters/texttopdf.c
index f3f0a3e2..eba323d6 100644
--- a/cupsfilters/texttopdf.c
+++ b/cupsfilters/texttopdf.c
@@ -621,7 +621,9 @@ cfFilterTextToPDF(int inputfd, // I - File descriptor input stream
doc.PageTop = 756.0f; // Top margin
doc.PageWidth = 612.0f; // Total page width
doc.PageLength = 792.0f; // Total page length
- doc.pdf = NULL;
+ doc.pdf = NULL; // PDF file contents
+ doc.Date = NULL; // Date string
+ doc.Title = NULL; // Title string
if (parameters)
doc.env_vars = *((cf_filter_texttopdf_parameter_t *)parameters);
@@ -1512,6 +1514,15 @@ cfFilterTextToPDF(int inputfd, // I - File descriptor input stream
free(doc.Page);
}
+ if (doc.PrettyPrint)
+ {
+ free(doc.Date);
+ free(doc.Title);
+ }
+
+ if (doc.pdf)
+ free(doc.pdf);
+
return (ret);
}
@@ -1766,6 +1777,7 @@ write_epilogue(texttopdf_doc_t *doc)
_cfPDFOutFinishPDF(doc->pdf);
_cfPDFOutFree(doc->pdf);
+ doc->pdf = NULL;
}
--
2.48.1
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